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shutdown/reboot Linux machine

if we want to reboot Linux we have two useful command:reboot now
and it will reboot the machine immediately.
Anther option is to use the shutdown command.shutdown -r now
and it will have the same effect like the previous command.

if we want to shutdown the machine then we can run:shutdown -h now

if we want to shutdown at a specific time like 14:30 then we can:shutdown -h 14:30

if we want to shutdown in 5 minutes:shutdown -h +5

if we want to cancel future shutdown:shutdown -c

This commands demand root privilege, so you may need sudo or just be root user.